/*
var a = 10;
if(a > 7){
    console.log('a>7');
}else if(a<7){
    console.log('a<7')
}else{
    console.log('a==7')
}*/
//分数:跳楼现象，满足一个
var score = 75;
if(score < 60){
    console.log('成绩不及格');
}else if(score <= 70){
    console.log('成绩及格')
}else if(score <= 80){
    console.log('成绩良好')
}else if(score <= 90){
    console.log('成绩优秀')
}else{
    console.log('学霸')
}


